1. Don't play games with me!
别跟我耍花招！
Don't frame me!
别诓我！
2. I don't know for sure.
我不确定。
生活实例：
Stranger: Could you tell me how to get to the town hall?
Tom: I don't know for sure. Maybe you could ask the policeman over there.
3. I'm not kidding.
我不是跟你开玩笑的。
生活实例：
Karin: You quit the job? You are kidding.
Jack: I'm not kidding. I'm serious.
4. That's really something.
太好了/太棒了。
生活实例：
A: I'm granted a full scholarship for this semester.
B: Congratulations. That's really something.
5. Brilliant idea!
这主意真棒！
6. You are a great help.
你帮了大忙。
7. I couldn't be more sure.
我再肯定不过了。
8. I am behind you.
我支持你。
生活实例：当你的男朋友/老公打算跳槽或是自己创业的时候，你就可以这么说Whatever decision you're going to make, I am behind you.